Liquid delivery and measuring device



April 18', 1933. E. HURLBRINK 1 1,904,829

LIQUID DELIVERY AND MEASURING DEVICE Filed Feb. 27, 1951 s Shee ts-Sheeti A ril 18, 1933.. E. HURLBRINK LIQUID DELIVERY AND MEASURING DEVICEFiled Feb. 27, 1931 3 Sheets-Sheet 2 \w z a I 0 .3. 0 4 1 5 M m 00% 2 a1 I a \d\ \v\ M Z 6 April 18, 1933. EIHURLBRINK LIQUID DELIVERY ANDMEASURING DEVICE Filed Feb. '27, 1951 s sheets sheet 5 .511 &

Patented Apr. 18, 1933 UNITED s'r 'ras PArar oF IcE nmrsw 3113mm OF BE RLIN'-.WIESTEND, (mam, Assumes, 'ro m m 1mm nxrnosronssrcmnn GEI'KS Esanzxozrrrm e.- m. B. 11., or sanzxo'r'rmw 1117..

GERMANY LIQUID DELIVERY MEASURING, DEVICE Application filed February 27,1931. Serial No. 518,807, and in Germany January id, 1980,

My invention relates todevices fondispensing and measuring of liquids,especially of fuels and lubricating oils, by means of a piston whichreciprocates in a cylinder" forming the measuring chambers, the liquidalternately being supplied into one of said measuring chambers through asupply-duct comin from the storage tank and being delivere from theother measuring chamber through the discharge duct leading to thetapping or delivery place and vice versa, the

delivered quantity of liquid being measured by counting the strokes ofthe piston or the operations of a reversing member controlling thesupply of the liquid to the one or the other of said measuring chambers.

The main object of my invention is to provide a device of the classdescribed in which, generally spoken, the measurement in the measuringcylinder is better perceivable and the limits of the strokes of themeasuring piston are to be ascertained in a panying drawings, myinvention consists in the arrangement and construction of a fluiddelivery and measuring device, of its elements andof the arrangementandcombina-.

tion of such elements all of which features are described in thespecification and illustrated in thedrawin s and particularly set forthin the claims ollowing the specification.

In the drawings, Figs. 1 to 3 show several forms of measuring cylindersaccording to my invention in vertical sections, the suppl discharge"anddelive ducts being partly shown in elevation, the reversing membercontrolling the liquid supply and discharge being represented in a more1 conventional manner, i

Fig. 4: shows a detail. W en using measuring devices with pistons of theclass' described above for the measuringpf dark or turbid liquids suchas lubricatingoil it' is alsoin the case that the "measuring cylinder istransparent not posof the piston at its stroke-limit.. It is thereforedesirable to equip the ta'pster with a means through which he mayascertain in a simple way whether the piston'has executed its fullstroke and the reversing valve may be actuated.

According to the present invention this means ipreferably consists inthe arrangement 0 a mark forming a full ring on the measuring pistonwhich mark reglsters in the end positions of the piston with marksprovided on the measuring cylinder consistingv of a transparentmaterial. Especially in measuring plstons forming a twin-piston theannular mark. may preferably consist of a thin disc which is arranged inthe intervening space between the two piston-halves and which'is inclose proximity or even in- -Ii1arks. The linear marks on the cylinderpreferably do not form uninterrupted lines but are provided withinterruptions, so that also in the case of a com lete' registering withthe annular. mark 0 the piston the latter is well to beperceived.The-arrangements which are in the following described in combinationwith measuring apparatus The material for such discs may prefwithhydraulically operated pistons may also be employed for measuringapparatus in which the measuring piston is operated manually or-by amotor.

According to Fig. -1-the twin-piston 44 54 operatin freel inthe glasscylinder 5- as in its middle an annular intervenin-g space C in'which adist-.311 formin the annular.

mark of the piston is arran ed in such a way that in the assembling othe piston the is executed by tightening the two nuts 47c, 47d which'arescrewed on the threaded ends of the bolts 53b keeping together the parts'95 ,.disc is clamped between. the two halves 44a, 54b of thepiston-body. The clamping halves together.- In the described embodir ofthe-piston including also the tightening cups 46, 55.' On the glasscylinder 5 an-- disc 311, as soon as the-pistonsreaches its upper or itslower stroke-end. The pistonstroke is limited by abutments 57 and 57aprovided on" the upper cylinder-cover 6 and on the lowerclosure-mounting 4 respectively against which abutments the pistonstrikes in the respective end positions with the ends of its screw-bolt53b keeping the two piston-' ment it is admissible that the covers orendclosures 6, 4 are'provided with socket-rims 6a, 4a1-of relativelylarge breadthwhich reach so far beyond the cylinder-ends that the piston44, 54 disappears with its ends behind the rims 6a and 4a, so that thecrroneous impression is avoided that after the arrival of the piston atits stroke-end there would still exist any liquid above or belowthepiston which liquid could be dispensed with the other liquid.

In the case that a piston-ends behind the socket-rims of theclosure-mountings 6, 4 is not considered necessary, the disc 241 mayalso be omitted,

be provided on and the annular mark may f d b h e orme y t e the ends ofthe piston or outer ed es 320, 321 oi the pistonor by the edges 0 therespective piston-cups, as 11- lustrated in Fig.2. In this case thepiston-' edge 320 cooperates with the linear mark 322 and the iston-edge321 withthe linear mark 323. he marks 322, 323 are for this purposedisplaced for a corresponding distance towards the cylinder-ends.

In the embodiment according to Fig. 3 the piston 44, 54 being alsoprovided with two tightening cups is not subdivided in the middle, andthereis also no real intervening space between he piston-halves. In

the said embodiment the annular mark 331a forms a narrow rin set/into anannular groove of the pistonody 53b; The colour of said ring is chosenin such a way that it lcontrasts distinctly with the other parts of thecylindrical surface of he iston. The piston may for instance be 0 ablack or dark brown colour, whereas the ring 311a may be made of alight-coloured metal such as German silver or of white celluloid or beprovided with a corresponding painting.

The linear marks 306, 313 and 314 of the glass cylinder 5 are preferablyexecuted in a red or brown or any other colour which is difierentfromthat of the iston-mark. Further the cylinder-marks 0 not form endlessrings but .are provided with interruptions 308 through which the annularmark 311a of the piston is also well visible in the case of its completeregistering with the linear marks 306, 313 or 314; The interdisappearingof the ruptions .are especially valuable in the median linear mark 306which serves for adjusting the iston in the median position designed byotted lines, such adjustment being efi'ected without a fixedstroke-limit,

reversing valve D.

In Fig. 4- a special embodiment of the annular mark or index-rin 311a isillustrated which is characterize by the feature that the ring isprovided with a slit 311-b like in a piston-ring, and that the outerdiameter of said ring is somewhat larger than the inner diameter oftheflmeasuring cylinder 5. In the case that the ring is moreover made ofa soft, elastic material such as celluloid, and is loosely inserted intothe res ctive circumferential grooveof the pistonody, the ring willleanelastically against the inner surface of the measuring 0 linder.Thereby the perceptibilit .from tie outside is also warranted in t ecase ,that the li uid to be measured is for instance a turbid 011. Themeasuring cylinder must be ground inside to rocure a good tightening ofthe piston. ut after the grinding the cylinder cannot be polishedvagain, so

solely 'by a corresponding actuation of the that theglance across therespective surface is dull in spite of the fact that the li uid to bemeasured moistens the said sur ace. .Already b a very small distance ofthe "piston-mar from the cylinder-wall the perceptibility is highlydecreased. This drawback is avoided by the ring 311a forming thepiston-mark being shaped and arranged generally in combination withdispensing and measuring devices of the class described. J I claim: 7

' 1. A device for dispensing and measuring of liquids, especially oflubricating oil, comprising: a measurin cylinder of a'transparentmaterial, a liquid supply duct, a liquid dispensing duct, a pistonadapted to red rocate in said measurmg cylinder and to $11 vide the saidmeasuring cylinder into two measuring chambers, reversing means adaptedalternately to connect the one or the other of said measuring chamberswith the liquid dsipensing lfi duct respectively, said piston form oftwo supply duct or with the liquid piston-parts spaced apart from eachother with an intervening space between them, linear marks provided onthe side wall of said measuring cylinder, and a flat disc secured tosaid piston between said pistonparts, the peripheric edge of said discbeing closely adjacent to the inner face of said measuring cylinder andforming a ring mark being in alignment'with said linear marks in each ofthe end positions of said piston.

2. A device for dispensing and measuring of liquids, especially oflubricating oil, com-. prising: a measuring cylinder of a transparentmaterial, a liquid supply duct, a'liquid dispensing duct, a piston adated to reciprocate in said measuring cylin er and to subdivide the saidmeasuring cylinder into two measuring chambers, reversing means adaptedalternately to connect the one or the other of said measuring chamberswith the liquid supply duct or with the liquid dispensing ductrespectively, said piston formed of two piston-parts spaced apart fromeach other with an intervening space between them, linear marks providedon the side wall of said measuring cylinder, and a thin annular disc ofa colour contrasting with the colour of the piston secured to the pistonbetween said piston-parts, the outer edge of said annular disc extendingclosely to the inner face of the measuring cylinder.

3. A device for dispensing and measuring of liquids, especially oflubricating oil, comprising: a measuring cylinder of a transparentmaterial, a liquid supply duct, a liquid dispensing duct, a pistonadapted to reciprocate in said measuring cylinder and to subdivide thesaid measuring cylinder into two measuring chambers, reversing meansadapt-- ed alternately to connect the one or the other i of saidmeasuring chambers with the liquid supply duct or with the liquiddispensing duct respectively, said piston formed of two piston-partsspaced apart from each other with an intervening space between them,linear marks provided on the side wall of said measuring cylinder, and athin annular disc of an elastic material secured to said piston, theouter edge of said annular disc extending closely to the inner wall ofthe measuring cylinder.

4. A device for dispensing and measuring of liquids especially oflubricating oil, comprising: a measuring cylinder of a transparentmaterial, a liquid supply d-uct, a liquid dispensing duct, a pistonadapted to reciprocate in said measuring cylinder and to sub divide thesaid-measuring cylinder into two measuring chambers, reversing meansadapted alternately-to connect the one or the other of said measuringchambers with. the liquid supply duct or with the liquid dispensing ductrespectively, said piston formed of two piston-parts spaced apart fromeach other with an intervening space between them, linear marks providedon the side wall of said measurin cylinder, and a narrow split ring of aflexi le oil-proof material such as,

celluloid between said piston-parts, said ring having before being setinto the cylinder an t outer diameter somewhat larger than the inwterior diameter of the cylinder.

5, In a device for dispensing and measuring of lubricating oil, ameasuring cylinder of a transparent'material, a piston adapted toreciprocate in said measuring cylinder and havinga-circumferentialrecess between its ends, linear marks provided on thesidewall of said measuring cylinder, and 'athin an- .nular disc ofelastic material disposed within said recess and secured to said piston,said annular disc extending radially closely to the inner face of saidmeasuring cylinder.

6. In a device for dispensing and measuring of lubricating oil, ameasuring cylinder of a transparent material, a piston adapted toreciprocate 1n sa1d measurlng c llnder and having a clrcumi'erentialrecess etween its ends, a plurality of linear marks, each adapted toreciprocate in said measuring cylinder and having a circumferentialrecess between 1ts ends, llnear marks provlded on the side wall of saidmeasuring cylinder,

and a thin annular disc of a colour contras't' ing with the colour ofthe piston and secured to the piston within its recess, theouter edge ofsaid annular disc extending closely to the inner face of said measuringcylinder.

8. In a device for dispensing and measuring of lubricating 011, ameasuring cylinder 'of a transparent material, a piston adaptedtoreciprocate in said measuring 0 linder and having a clrcumferentialrecess etween its ends, a plurality of linear marks each formed of aninterrupted circle around said measuring cylinder, and a thin annulardiscof an .elastic material secured to said piston and adapted toregister with each of said linear marks, the outer edge of said annulardisc extending closely to the inner face of said measuring cylinder.

In testimony whereof I afiix my signature.

' ERNST HURLBRINK.

